US4744987A - Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation - Google Patents
Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation Download PDFInfo
- Publication number
- US4744987A US4744987A US07/081,584 US8158487A US4744987A US 4744987 A US4744987 A US 4744987A US 8158487 A US8158487 A US 8158487A US 4744987 A US4744987 A US 4744987A
- Authority
- US
- United States
- Prior art keywords
- microcrystalline cellulose
- particulate
- calcium carbonate
- coprocessed
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 123
- 229920000168 Microcrystalline cellulose Polymers 0.000 title claims abstract description 88
- 235000019813 microcrystalline cellulose Nutrition 0.000 title claims abstract description 88
- 239000008108 microcrystalline cellulose Substances 0.000 title claims abstract description 87
- 229940016286 microcrystalline cellulose Drugs 0.000 title claims abstract description 87
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 60
- 239000000203 mixture Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title description 4
- 239000002002 slurry Substances 0.000 claims abstract description 61
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000000546 pharmaceutical excipient Substances 0.000 claims abstract description 21
- 238000001694 spray drying Methods 0.000 claims abstract description 17
- 229940124531 pharmaceutical excipient Drugs 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 25
- 239000007787 solid Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000012736 aqueous medium Substances 0.000 claims description 7
- 239000011236 particulate material Substances 0.000 claims description 5
- 239000000047 product Substances 0.000 description 43
- 239000000314 lubricant Substances 0.000 description 9
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007907 direct compression Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 229940088594 vitamin Drugs 0.000 description 4
- 229930003231 vitamin Natural products 0.000 description 4
- 235000013343 vitamin Nutrition 0.000 description 4
- 239000011782 vitamin Substances 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000008194 pharmaceutical composition Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 2
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 2
- 229940038472 dicalcium phosphate Drugs 0.000 description 2
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000008101 lactose Substances 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 150000003722 vitamin derivatives Chemical class 0.000 description 2
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007970 homogeneous dispersion Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229960001375 lactose Drugs 0.000 description 1
- 150000002646 long chain fatty acid esters Chemical class 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- IPCSVZSSVZVIGE-UHFFFAOYSA-N palmitic acid group Chemical group C(CCCCCCCCCCCCCCC)(=O)O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000007916 tablet composition Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2022—Organic macromolecular compounds
- A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
- A61K9/2054—Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2009—Inorganic compounds
Definitions
- This invention relates to a particulate composition that contains microcrystalline cellulose and calcium carbonate and which is useful as an excipient in pharmaceutical formulations.
- microcrystalline cellulose and calcium carbonate are processed together in an aqueous medium and dried to yield a particulate excipient product.
- Microcrystalline cellulose is a purified, partially depolymerized cellulose that is prepared by treating alpha cellulose, in the form of a pulp manufactured from fibrous plant material, with mineral acids. It is a white, odorless, tasteless, relatively free flowing powder that is insoluble in water, organic solvents, dilute alkalis and dilute acids.
- U.S. Pat. Nos. 2,978,446 issued to Battista et al. and 3,146,168 issued to Battista are basic patents describing microcrystalline cellulose and its manufacature; the latter patent concerns microcrystalline cellulose for pharmaceutical applications.
- Microcrystalline cellulose finds widespread use as a pharmaceutical excipient, an inactive (non-drug) ingredient in pharmaceutical formulations. Its inherent compressibility characteristics account for its popularity as a pharmaceutical excipient, since good binding and disintegration properties are obtained with microcrystalline cellulose when used in direct compression tablet formulations.
- microcrystalline cellulose Compared to other tablet additives like partially pregelatinized cornstarch, lactose, and dicalcium phosphate, microcrystalline cellulose exhibits superior compressibility and disintegration properties. Unlike these additives, microcrystalline cellulose is relatively costly to manufacture; this limits its use in price-sensitive formulations like vitamins.
- a lower cost excipient which has tabletting characteristics similar to those of microcrystalline cellulose would satisfy a need for an economical excipient with good performance that is desired by the vitamin market.
- microcrystalline cellulose coprocessed with either starch or calcium sulfate, as described by Schwartz et al. in Drug & Cosmetic Industry 118, 60 (April 1976) and 114, 44 (April 1974), offers direct compression tabletting performance that falls short of that for microcrystalline cellulose alone.
- the present invention accomplishes this objective with microcrystalline cellulose that is coprocessed with a second, inexpensive component in a manner that yields a particulate product with unexpectedly good excipient performance characteristics.
- a composition of matter useful as a pharmaceutical excipient is provided by particulate coprocessed microcrystalline cellulose and calcium carbonate, the two components being present in a weight ratio of from about 75:25 to 35:65 microcrystalline cellulose:calcium carbonate.
- the microcrystalline cellulose and calcium carbonate are intimately associated in the coprocessed particulate product and may be present as agglomerates of the two components.
- the particulate coprocessed composition is preferably a spray dried material.
- Particle size of the coprocessed product should be substantially all less than No. 60 sieve (250 ⁇ m) and preferably has an average particle size in the range of from 20 ⁇ m to 150 ⁇ m.
- the particulate coprocessed composition is prepared by forming a well-dispersed aqueous slurry of microcrystalline cellulose and calcium carbonate, both being present in particulate form and in amounts which provide a component ratio in the range of from 75:25 to 35:65 microcrystalline cellulose:calcium carbonate for the coprocessed product; and drying the aqueous slurry by removing water therefrom, to yield a particulate coprocessed product.
- the aqueous well-dispersed slurry of the two components is preferably formed by introducing microcrystalline cellulose and calcium carbonate into an aqueous medium, with their addition being in the order mentioned, in amounts that yield a relatively concentrated slurry of at least 10 wt % solids.
- the aqueous slurry is preferably dried by spray drying to yield the particulate coprocessed product.
- the particulate coprocessed product of this invention contains two essential components, microcrystalline cellulose and calcium carbonate.
- the two components are present in the product in a weight ratio in the range of about 75:25 to 35:65 microcrystalline cellulose:calcium carbonate.
- the ratio of the two components is preferably in the range of about 70:30 to 40:60 microcrystalline cellulose:calcium carbonate, and most preferably, in the range of about 65:35 to 50:50 microcrystalline cellulose:calcium carbonate.
- additives may be incorporated into the particulate product during its preparation. These are ordinarily present in relatively small amounts, representing less than 20%, and preferably less than 10%, of the total particulate product weight.
- Such additives may be incorporated to facilitate the coprocessing procedure, particularly during the drying step, or to provide enhanced properties for the particulate product in its use as a pharmaceutical excipient.
- binders e.g., water-soluble gums like hydroxypropylmethylcellulose, methylcellulose, polyvinylpyrrolidone, etc.
- lubricants e.g., long chain fatty acid esters or salts thereof like palmitic and stearic acids
- disintegrants like cross-linked carboxymethylcellulose, starch, etc.
- the particulate coprocessed product of this invention possesses desirable performance attributes that are not shown with the corresponding dry-blend of microcrystalline cellulose and calcium carbonate.
- the mechanism that occurs during the coprocessing procedure required in this invention is not fully understood but appears to yield a particulate product in which the two essential components are in intimate association with each other. This intimate association or admixture of microcrystalline cellulose and calcium carbonate cannot be achieved through simple dry blending of these materials, but rather requires that they be coprocessed as an aqueous slurry or mixture.
- particulate coprocessed product e.g. its particle size, moisture content, bulk density
- these physical characteristics are in large measure dependent on the manner in which the microcrystalline cellulose and calcium carbonate are coprocessed. It is for this reason that the drying step in the coprocessing procedure is especially critical, and it is the reason that spray-drying is the preferred method for accomplishing the drying step.
- the process for preparing the particulate product of this invention involves forming a well-dispersed aqueous slurry of microcrystalline cellulose and calcium carbonate, in which both materials are present as particulate solids.
- the relative amounts of the two components are adjusted in the slurry to yield the specific weight ratio desired in the recovered coprocessed product. Since the weight ratio of the two components in the particulate coprocessed product corresponds closely to that in the precursor well-dispersed slurry, this ratio adjustment is relatively straightforward.
- the process of this invention next involves drying the aqueous slurry by removing water from it to yield the particulate coprocessed product.
- spray drying is the preferred drying means but other drying methods, e.g. flash drying or fluidized bed drying, may also be adapted for use in this coprocessing step.
- microcrystalline cellulose The two components employed in forming the well-dispersed aqueous slurry are microcrystalline cellulose and calcium carbonate.
- the source and nature of these components are not critical.
- the microcrystalline cellulose is preferably wet cake from a conventional microcrystalline cellulose manufacturing process.
- the wet cake is material which has not yet been dried, sometimes termed "never dried” or hydrocellulose, to yield a conventional microcrystalline cellulose free-flowing powder product.
- the microcrystalline cellulose source may also be conventional product, which has already been dried.
- Particle size of the microcrystalline cellulose used in the aqueous slurry is ordinarily that which is encountered in conventional microcrystalline cellulose product, or in its precursor wet cake, i.e., never dried product.
- the particle size is desirably such that substantially all particles are less than No. 60 sieve (250 ⁇ m) in size.
- the calcium carbonate (CaCO 3 ) employed in this invention is preferably a precipitated material.
- Precipitated calcium carbonate is ordinarily more pure than ground calcium carbonate and typically has a finer particle size. Ground calcium carbonate may nevertheless be used as a source with satisfactory results.
- the particulate calcium carbonate is preferably finer in particle size than the particulate microcrystalline cellulose with which it is coprocessed. Extremely fine particle size calcium carbonate is more readily combined in intimate association with the microcrystalline cellulose during coprocessing of the two components.
- Calcium carbonate sizing is preferably such that substantially all particles are less than 30 ⁇ m in size and, more preferably, less than 10 ⁇ m. Average particle size of the calcium carbonate is desirably less than 5 ⁇ m and, more preferably, is less than 2 ⁇ m.
- microcrystalline cellulose and calcium carbonate are substantially insoluble in water. Consequently, the particle size of the material present in the well-dispersed aqueous slurry is directly related to the sizing of the two components introduced to the slurry; i.e., there is no appreciable dissolution of either of the two components in the aqueous slurry.
- the aqueous slurry of these two components may be prepared in any of several ways.
- the two solid components may both be introduced into a single aqueous medium, or each may be introduced separately into separate aqueous media which are then combined, or other analogous procedures may be devised.
- a preferred procedure involves dispersing the microcrystalline cellulose alone into an aqueous solution, preferably water.
- Typical solids concentrations for this aqueous mixture are from 5-25 wt % microcrystalline cellulose but 10-20 wt % microcrystalline cellulose is preferred.
- the appropriate amount of calcium carbonate is then added, in dry form, with mixing being continued during its addition.
- the exact amount of calcium carbonate to be added depends on the microcrystalline cellulose content of the slurry and the ratio of the two components desired in the coprocessed product. Water may also be added if a more dilute slurry is desired, but this is usually not required.
- the aqueous slurry containing the two components should be well mixed to assure uniform dispersion of the components throughout the aqueous medium. This is necessary to provide for a uniform, consistent component ratio in the particulate product, prepared via drying the aqueous slurry.
- the total solids content of the aqueous slurry is preferably at least 10 wt %, based on the total slurry weight, and is more preferably at least 20 wt % solids.
- the higher solids content levels are desirable since the amount of water that must be removed during the drying step is accordingly reduced.
- the upper limit on solids content in the aqueous slurry is typically determined by the operating constraints of the drying apparatus used. With the preferred spray drying procedure, solids contents of 20-30 wt % are representative for aqueous slurries that can be readily processed.
- Temperature of the aqueous slurry is not critical. Ambient temperatures, of from about 10°-25° C., are preferred. Higher slurry temperatures may be employed, and these may be desirable with certain types of drying equipment.
- the drying of the well-dispersed aqueous slurry is preferably accomplished by spray drying of the slurry.
- Conventional spray drying equipment may be employed, and operating procedures that are familiar to those experienced in the spray drying art are applicable to the spray drying step of this process.
- Drier (drier gas) outlet temperature is ordinarily used to control the residual moisture level obtained in the coprocessed particulate product.
- Moisture levels of about 1-8 wt % H 2 O are desired in the particulate, dried product and moisture levels of about 3-7 wt % are most preferred. These levels are based on the finding that the coprocessed product, if completely dried (no residual moisture), will usually absorb moisture from the atmosphere, in amounts within these specified ranges.
- drier outlet temperatures are ordinarily in the range of about 40°-100° C.
- drier inlet temperatures are higher, ordinarily in the range of about 90°-300° C.
- the coprocessed product recovered from the drying operation is a free-flowing particulate solid, that is typically a granular white powder in appearance.
- Particle size of the product is a function of the particle sizing of the microcrystalline cellulose and calcium carbonate in the aqueous slurry and, more importantly, of the drying conditions employed for removing water from the slurry.
- the particulate coprocessed product should have a particle size that is substantially all less than No. 60 sieve (250 ⁇ m).
- Average particle size of the particulate material is preferably in the range of from about 20 ⁇ m to 150 ⁇ m, and more preferably is in the range of from about 30 ⁇ m to 100 ⁇ m.
- Bulk density (loose) of the coprocessed product typically is in the range of about 0.35-0.45 g/cm 3 ; microcrystalline cellulose ordinarily exhibits a loose bulk density of around 0.28-0.30 g/cm 3 .
- An aqueous slurry of the coprocessed product with the preferred component ratio of 60:40 exhibits a moderately alkaline pH around 9.5-10, whereas microcrystalline cellulose in an aqueous slurry has a pH of around 6.5-7.
- the particulate coprocessed product of this invention besides being economical, has several desirable properties that make it particularly well-suited for use as an excipient for vitamins, in direct compression tabletting applications.
- the coprocessed microcrystalline cellulose/calcium carbonate product exhibits low lubricant sensitivity; its compression profile (tablet hardness vs. tablet compression force) remains relatively unchanged when various lubricants are employed with the excipient.
- This lubricant insensitivity extends both to lubricant level (amount) and lubricant type (magnesium stearate, stearic acid, etc.).
- the compression force required to produce a specific tablet hardness does not change when lubricants are employed with the coprocessed excipient of this invention.
- the compressibility of this coprocessed product compares favorably with that of commercially available microcrystalline celluloses.
- Compressibility is typically measured as the profile, or shape, of the plot of tablet hardness vs. tablet compression force.
- Compressibility of a excipient is desirably high, since low levels of excipient may then be used in tabletting an active ingredient (with concurrent larger amounts of active ingredient being present) without compromising tablet performance characteristics.
- the compressibility profile of a 60:40 microcrystalline cellulose:calcium carbonate coprocessed product is very similar to that of microcrystalline cellulose available from Ming Tai and designated 101 grade. Both of these are less compressible than Avicel®PH-101 microcrystalline cellulose, a commercial product manufactured by FMC Corporation.
- the Example describes the preparation of a particulate coprocessed microcrystalline cellulose and calcium carbonate product having the two components present in a weight ratio of about 60:40.
- the particulate coprocessed composition is prepared by spray drying, a preferred drying procedure.
- microcrystalline cellulose material obtained from a conventional microcrystalline cellulose manufacturing process as moist product filter cake that has not been dried, is introduced into water at about 20° C. in a sufficient amount to yield an aqueous slurry containing about 17-18 wt % solids.
- microcrystalline cellulose that is employed to make the slurry is particulate in form, but exact sizing is difficult to measure due to its being a moist filter cake.
- Calcium carbonate a precipitated fine powder having an average particle size of about 1 ⁇ m (USP Albaglos precipitated calcium carbonate from Pfizer, Inc.), is introduced into the microcrystalline cellulose slurry in an amount corresponding to two-thirds of the amount (weight) of the microcrystalline cellulose.
- the aqueous slurry containing about 25 wt % solids, is thoroughly mixed so as to assure homogeneous dispersion of the two solid components throughout the slurry.
- the well-dispersed slurry is then fed continuously to a Koch 40 ft. diameter spray drier, in which the drier inlet and outlet temperatures are maintained at about 180° C. and 70° C., respectively.
- the particulate spray-dried coprocessed material recovered from spray drying contains a 59-41 weight ratio of microcrystalline cellulose:calcium carbonate.
- the free-flowing white powder has a loose bulk density of about 0.39-0.40 g/cm 3 , is substantially all smaller than No. 60 sieve (250 ⁇ m), and has an average particle size of about 61 ⁇ m.
- the spray drying temperature conditions and slurry feed rate yield a particulate product that contains about 3 wt % H 2 O.
- Particulate spray-dried coprocessed product prepared in the manner just described may be employed as an excipient in vitamin or other pharmaceutical formulations intended for direct compression tabletting.
- the procedure for such use in direct compression tabletting is conventional: blend the excipient in the desired amount with the other dry ingredients to be tabletted; add lubricants, if desired, and continue blending a short period longer, e.g., five minutes; and compress the dry blend at the desired hardness setting in a tabletting machine.
Abstract
Description
Claims (24)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/081,584 US4744987A (en) | 1985-03-08 | 1987-08-03 | Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70974885A | 1985-03-08 | 1985-03-08 | |
US07/081,584 US4744987A (en) | 1985-03-08 | 1987-08-03 | Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US70974885A Continuation | 1985-03-08 | 1985-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4744987A true US4744987A (en) | 1988-05-17 |
Family
ID=26765722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/081,584 Expired - Lifetime US4744987A (en) | 1985-03-08 | 1987-08-03 | Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation |
Country Status (1)
Country | Link |
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US (1) | US4744987A (en) |
Cited By (92)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0439373A1 (en) * | 1990-01-26 | 1991-07-31 | Pfizer Inc. | Low density agglomerate utilizing a carbohydrate binder |
US5060673A (en) * | 1989-09-29 | 1991-10-29 | R. J. Reynolds Tobacco Company | Agglomerated matrix for cigarettes and method for making same |
US5105836A (en) * | 1989-09-29 | 1992-04-21 | R. J. Reynolds Tobacco Company | Cigarette and smokable filler material therefor |
US5109876A (en) * | 1990-04-19 | 1992-05-05 | R. J. Reynolds Tobacco Company | Cigarette paper and cigarette incorporating same |
US5129408A (en) * | 1990-08-15 | 1992-07-14 | R. J. Reynolds Tobacco Company | Cigarette and smokable filler material therefor |
US5153020A (en) * | 1988-06-24 | 1992-10-06 | The Nutrasweet Company | Carbohydrate cream substitute |
WO1993012768A1 (en) * | 1991-12-30 | 1993-07-08 | Fmc Corporation | Microcrystalline cellulose spheronization composition |
AU640725B2 (en) * | 1989-12-22 | 1993-09-02 | Syntex Pharmaceuticals International Ltd. | Spray drying process for making pharmaceutical powder compositions directly compressible into tablets |
US5356896A (en) * | 1991-12-12 | 1994-10-18 | Sandoz Ltd. | Stabilized pharmaceutical compositions comprising an HMG-CoA reductase inhibitor compound |
US5358717A (en) * | 1989-12-22 | 1994-10-25 | Syntex (U.S.A.) Inc. | Directly-compressible naproxen or naproxen sodium compositions |
US5368878A (en) * | 1990-02-20 | 1994-11-29 | A. E. Staley Manufacturing Company | Reduced fat meat products |
US5370894A (en) * | 1988-06-24 | 1994-12-06 | The Nutrasweet Company | Carbohydrate cream substitute |
US5372835A (en) * | 1990-02-20 | 1994-12-13 | A. E. Staley Manufacturing Company | Method of preparing reduced fat foods |
US5374442A (en) * | 1990-02-20 | 1994-12-20 | A. E. Staley Manufacturing Company | Method of preparing reduced fat foods |
WO1994028911A1 (en) * | 1993-06-08 | 1994-12-22 | Farmaceutisk Laboratorium Ferring A/S | COMPOSITIONS FOR USE IN THE REGULATION OF SUBNORMAL pH VALUES IN THE INTESTINAL TRACT AND FOR TREATMENT OF BOWEL DISEASES |
US5376399A (en) * | 1992-05-15 | 1994-12-27 | A.E. Staley Manufacturing Co. | Reduced fat cremes |
USH1394H (en) * | 1992-05-22 | 1995-01-03 | A. E. Staley Manufacturing Company | Method of preparing reduced fat spreads |
US5378286A (en) * | 1990-02-20 | 1995-01-03 | A. E. Staley Manufacturing Co. | Method of preparing reduced fat foods |
US5378491A (en) * | 1990-02-20 | 1995-01-03 | A. E. Staley Manufacturing Co. | Method of preparing a starch hydrolysate, an aqueous starch hydrolysate dispersion, method of preparing a food containing a starch hydrolysate, and a food formulation containing a starch hydrolysate |
USH1395H (en) * | 1992-05-22 | 1995-01-03 | A. E. Staley Manufacturing Company | Composition and method of preparing reduced fat spreads |
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